Owner Two Step Renounce Module

Two-step ownership renouncement with ERC-173 logic

Key Features

• Helper functions for renouncing ownership and clearing pending-owner state.
• renounceOwnership guards by requiring msg.sender is the stored owner.
• Emits OwnershipTransferred with newOwner == address(0).

Module Usage

Import this module into facets or shared setup code. Its functions are internal (including Solidity file-level helpers). Use them through your facet’s external entrypoints.

Storage follows the diamond slot layout in this file; any code using the same STORAGE_POSITION or related positions reads and writes shared state.

See Facets & Modules for more information.

Storage

State Variables

Property	Type	Description
OWNER_STORAGE_POSITION	bytes32	Owner storage position within the diamond (Value: keccak256("erc173.owner"))
PENDING_OWNER_STORAGE_POSITION	bytes32	Pending owner storage position within the diamond (Value: keccak256("erc173.owner.pending"))

OwnerStorage

Definition

/** storage-location erc8042:erc173.owner */
struct OwnerStorage {
  address owner;
}

---

PendingOwnerStorage

Definition

/** storage-location erc8042:erc173.owner.pending */
struct PendingOwnerStorage {
  address pendingOwner;
}

Functions

getOwnerStorage

Returns a pointer to the ERC-173 storage struct. Uses inline assembly to access the storage slot defined by OWNER_STORAGE_POSITION.

function getOwnerStorage() pure returns (OwnerStorage storage s);

Returns:

Property	Type	Description
s	OwnerStorage	The OwnerStorage struct in storage.

---

getPendingOwnerStorage

Returns a pointer to the PendingOwner storage struct. Uses inline assembly to access the storage slot defined by PENDING_OWNER_STORAGE_POSITION.

function getPendingOwnerStorage() pure returns (PendingOwnerStorage storage s);

Returns:

Property	Type	Description
s	PendingOwnerStorage	The PendingOwnerStorage struct in storage.

---

renounceOwnership

Renounce ownership of the contract. Sets the owner to address(0) and clears any pending owner, disabling all functions restricted to the owner.

function renounceOwnership() ;

Events

This emits when ownership of a contract changes.

Signature:

event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

Errors

Signature:

error OwnerUnauthorizedAccount();

Best Practices

• Ensure the caller is the owner before invoking state-changing functions.

Integration Notes

This module interacts with diamond storage at the slots defined by OWNER_STORAGE_POSITION and PENDING_OWNER_STORAGE_POSITION.

The renounceOwnership function directly modifies the owner & pendingOwner fields within the storage structs, setting it to address(0). These changes are immediately visible to all facets that access the same storage slots.

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Last updated:March 13, 2026